Mostly bugfixes

• Allow using completion-styles in helm.
• Rewrite helm-M-x using completion-styles.
• Fix window issues with dedicated frames.

Finally remove helm-org as dependency.

• helm-org is now a Melpa dependency of helm.
  Users installing from Git are NOT affected by this i.e. helm-org is NOT needed by Helm, it is just added as dependency for people installing from Melpa to not break others helm-org related packages.

• Helm-org have been removed it is now in Emacs-helm as a separated package.
• Upgrading packages improved (order of packages).
• Eshell command on files improved.
• Class docstrings are now readable (advice).
• Emacs-helm.sh have more options and better help (with -h).
• And various bugfixes as always.

• Allow toggling line number display (relative).
• Arrow keys <left> and <right> are behaving like in Emacs vanilla by default.
• Completion-at-point is now preventing user when deleting prefix.
• New slot :match-dynamic.

Rewrite of helm-occur, it is now fast and use separate sources for each buffer, all previous features are still here, edition of results is done by wgrep as before.

• New library helm-comint.el (provide prompt navigation)
• Keep improving trashing on Linux
• Many bug fixes as usual

No important changes, some bug fixes as always, some unneeded fixes to stop users complaining also.

This is an important release however as it mark the end of serious development of helm for a while until I get more support for the work I make on Helm, see README for more infos.